Homemade battery packs 48volts

  • #26
i'm glad you are familiar with them.

Have you ever done any arc welding? 100 amps at 25 volts will weld 1/4 inch steel plate.

I wasn't familiar with the batteries
if you're not familiar with high current - just wanted to warn you. i dont know your background.
And I am glad that you did not catch your pants on fire.

I have played around with MOV transformers and made some pretty large arcs but I have not arc welded yet. I will either buy an arc welder or make a spot welder this summer



so thank you for the data about how many amps it takes to cut a 1/4inch steel plate.

Thank you for warning me and telling me a funny story. Safety is always a top priority when dealing with those dangerous currents; anywhere from 15ma to 100 ma is dangerous enough to cause severe pain and even death!

:
 
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  • #27
F5B kit will do 300 amps but it's all optimised for burst running because of the nature of the F5B event. If you ran them for more than say 6 seconds at a time the aircraft is likely to be out of sight upwards or exceeding VNE!

When I flew F5B some years ago the two main companies for F5B competition motors were Kontronic in Europe and Aveox in the USA. Kontronic also made speed controllers. Competition motors weren't really available in shops. Usually got them direct of from reps at competitions. Some were special order only.

The same companies make motors for continuous running (eg scale models) but I'm not familiar with their latest range. Sounds like you might need a custom motor and controller.

Kontronic
http://www.kontronik.com
Aveox
http://www.aveox.com/
Nidec
http://www.nidec.com/
http://www.nidec.com/en-NA/technology/capability/f5b/
Thanks for the cool data about high amperage motors, I think those companies make batteries or motors for electric car, I am glad this technology is emerging in the average Joe's life.

It is cool that you used to fly those types of planes. Besides acceleration what type of peformance do those rc planes have?
 

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